SU1007182A1 - Amplitude-modulated oscillations shaping device - Google Patents

Abstract

1. FORMER ASH1LY UDNA-MANIPULATED VIBRATIONS, containing a series-connected source of carrier frequency signals and a control key, to the control input of which is connected the output of a source of manipulating signals, a series-connected adder and a nt cascade resonant Amplifier, 1, as well as a junction box. If so, in order to reduce the distortion of the shape of the output signals, between the source source of the carrier signal and the input of the adder when the modulator, the input and output of the compensation signal generator are connected respectively to the output of the source of the manipulating signals and the second input of the balanced main unit modulator, and the output of the controlled key is connected to the second input of the adder. 2. The former according to claim 1, which is characterized by the fact that the generator of signals of sensation contains n series-connected generators of rectangular pulses whose outputs are connected to the corresponding1 | (the inputs to the weight cyfMaTopa, serially connected inverter, the input of which is connected to the output of the weight adder, and ke F у Utator, the second input of which is also connected to the output of the weighing succator, and the output of the sensing signal, as well as the unit for generating short pulses , the output of which is connected to the input of the first of the P rectangular pulse generators, the input is connected to the control input of the || Mutator, and the point of their connection is the input of the compensation signal generator.

Description

The invention relates to radiotohKyiKe and may be used in radio communication, radar and navigation for generating amplitude oscillations manipulirovaknyh sinusoidal generator known -amplitudno manipulirovannyh oscillations comprising series-connected source carrier frequency signal and a controllable switch, to the control WMOs row whose output is connected a source of manipulating signals, a series-connected adder and an h-cascade resonant amplifier (which is included in the equipment stot hydrochloric transmission system), and i-akzhe FORMS rovatel kog.a ensatsii signals ui. However, in the well-known amplitude-manipulated oscillation shaper, there are significant distortions in the shape of the output signals due to transients in the cascade and resonant amplifier, arising due to amplitude jumps at the input voltage. I-fr The purpose of the invention is to reduce the fori distortion of output signals. The goal is achieved by the fact that the shaper of an amplitude-manipulated oscillation, containing serially connected sources of carrier, frequency and control key, to the control input of which is connected the output of the source of manipulating signals, serially connected adder and C-cascade resonant amplifier, as well as shaper. compensation signals. Between the output of the carrier signal source and the input of the summatter, enter the balanced amplitude modulator, the input and output of the compensation compensator are connected respectively to the output of the source of the manipulating signals and the second input of the balanced amplitude modulator, and the output of the controlled key is connected to the second input of the adder, at the same time, the compensation signal generator contains AND series-connected square pulse generators, the outputs of which are connected to the corresponding inputs A sushi-curtain, connected in series with an inverter, whose input is connected to the output of the weight adder, a switch, the second input of which is also connected to the output of the weight sum of the torus, and the output is the output of the compensation signal generator, as well as a unit for generating short pulses, the output of which is connected to the input of the first of the P square pulse generators, the input is connected to the control input of the switch, and their connection point is the input of the compensation signal generator. Fig. 1 shows a structural electrical circuit of a driver of amplitude-manipulated oscillations; Fig. 2 is a structural electrical circuit of a compensation signal driver in FIG. 3 shows an example of the execution of a compensation signal conditioner during the execution of an I-stage resonant amplifier with a number of stages P 3; 4 shows timing diagrams of the amplitude-manipulated oscillation generator for case h 3. The amplitude-manipulated oscillation driver contains a source 1 of carrier frequency signals, a control key 2, an adder 3, and a cascade resonant amplifier 4, a source 5 of manipulating signals, a balanced amplitude modulator 6 and driver 7 compensation signals. At the same time, the shaper 7 of the compensation signals contains a short pulse shaping unit 8, a weight adder 9, an inverter 10, a switch 11, a rectangular pulse generator 12, and when the shaper of 7 compensation signals is executed, when the short pulse shaping unit 8 contains a puller 13 pulses on the front, the shaper of 14 km of pulses on the slice and the element OR 15, and the generators of 12 rectangular pulses contain a differential circuit 16 and a waiting multi-. The tvibrator 17. A shaper of amplitude-manipulated oscillations operates as follows. The signal from the output of the source 1 of the carrier frequency signals (Fig. 4-a) is fed to the first inputs of the controllable switch 2 and the balanced amplitude modulator 6. The operation of the control switch 2 is controlled by the output signal of the source 5 of the manipulating signals (Fig.4-b ), a part of which is simultaneously applied to the input of the imager 7, which controls the operation of the balanced amplitude modulator 6. At the output of the controlled key 2, the signal shown in FIG. 4-in. I At the moments of the front and slice of the output impulse of the source 5 at (1 3 the corresponding shaper 13 and 14 produces rectangular pulses of positive polarity, which through the OR 15 element arrive at the output of block 8 of figure 4-g) and are used to start the first generator. 12. After differentiation in the differential circuit 16, these pulses trigger the multivibrator 17, producing positive polarity pulses of duration n. By cutting out the output pulse of the first generator 12, the second generator 12 is started, and to generate pulses that differ from the output pulses of the first generator 12 only by polarity. A third generator 12 is started by cutting the output pulse of the second generator 12, producing pulses identical to the output generator 12. pulses of the first generator 12. The oscillogram of the sequence of pulses produced by AND generators 12 is shown in FIG. 4 days In order to compensate for the transient processes in the P cascade resonant amplifier 4, after amplifying the output pulse of the source 5, the amplitude of each ilAtulse in the sequence must be calibrated. This is achieved by applying the output pulse of each heater 12 to the corresponding of the h inputs of the weight adder 9, at which the conductivity U n of the nth input of the weight adder 9 is determined by the expression 1 + p pe (e + i-nU K: where). t / L is half the bandwidth of a single cascade P of a cascade resonant amplifier 4, the value of n coincides with the number of the generator 12 rectangular pulses, with the output of which is connected to the input of the weight adder 9. As a result, each pulse from the generated sequence has an amplitude necessary to compensate the transition of the LH processes in the h cascade resonator on the amplifier on the interval. The output voltage of the weight of the adder 9 is supplied to the first and second inputs of the switch 11 directly and through the inverter 10, respectively. The operation of the switch 11 is controlled by the output pulse of the source 5 in such a way that after the front of this pulse, the output of the switch 11 is connected to its first input, and after the cutoff - to the second input. An oscillogram of the output voltage of the switch 11, which is the output voltage of the driver 7, is shown in FIG. 4th This voltage is used as a control in a balanced amplitude modulator 6. The output voltages of the controlled key 2 of a balanced amplitude modulator b (Fig. 4-g) through the corresponding adder 3 are fed to the input d of the cascade resonant amplifier 4. As a result the amplitude of the manipulated oscillation from the output of the control key 2 and the sequence of additional radio pulses from the output of the balanced amplitude modulator 6 transient process in the H-stage resonant amplifier 4 is terminated after a time m after amplitude manipulation. I FIG. 4-3 and FIG. 4-I shows the envelopes of one of the signals And the cascade resonant amplifier 4, respectively, in the proposed and well-known amplifiers of amplitude-manipulated oscillations. Thus, the proposed shaper of amplitude-manipulated oscillations can significantly reduce the distortion of the shape of the output signals by reducing the duration of transients in the P-stage resonant amplifier. This provides an increase in the reliability of information transmission in radio communications, radiolocation, radio telemetry and radio control, and also solves one of the actual problems of infogilation transmission associated with an increase in modulation speed at a constant channel bandwidth, as it eliminates intersymbol distortions.

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Claims (2)

1. SHAPER OF AMPLITUDE-MANIPULATED OSCILLATIONS, containing a serially connected source of carrier frequency signals and a controlled key, to the control input of which is connected the output of a source of manipulating signals, a series-connected adder and PG cascade resonant amplifier, as well as a shaper of compensation signals, and with the fact that, in order to reduce distortions in the shape of the output signals, between the output of the frequency source and the balanced input signal carrier is entered by the adder. the amplitude modulator, at and the output of the compensation signal generator, are connected respectively to the output of the source of the manipulating signals and the second input of the balanced amplitude modulator, and the output of the controlled key is connected to the second input of the adder. 2. Shaper by π. 1, characterized in that the compensation signal shaper contains η series-connected ^ Rectangular pulse generators, the outputs of which are connected to the corresponding inputs of the weight adder, a series-connected inverter, the input of which is connected to the output of the weight adder, and a switch, _β The swarm input of which is also connected to the g output of the weight adder, and the output _ is the output of the compensation signal generator, as well as the short pulse generation unit, the OUTPUT (whose ma is connected to the input of П П generators of rectangular impulses§, the input is connected to the control input of the switch, and the point of their connection is the input of the driver _ compensation signals. h · / Figure 1>